| Coatréven | |
| Native Name: | Koatreven |
| Commune Status: | Commune |
| Image Coat Of Arms: | COA fr Coatréven.svg |
| Coordinates: | 48.7692°N -3.3414°W |
| Insee: | 22042 |
| Postal Code: | 22450 |
| Arrondissement: | Lannion |
| Canton: | Tréguier |
| Mayor: | Yves Le Rolland[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Lannion-Trégor Communauté |
| Elevation Min M: | 17 |
| Elevation Max M: | 101 |
| Area Km2: | 9.13 |
Coatréven (in French pronounced as /kwatʁevɛ̃/; Breton: Koatreven) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
The name Coatréven is typically Breton, "koad" meaning "wood" and "Raven" from the name of an Armorican saint of the 4th century or "tréven" could come from the Old Breton "treb" meaning "village".
Inhabitants of Coatréven are called Coatrévenais in French.